struct-gpt 2.0.2

structured llm outputs

struct-gpt

Features

• Easy creation of custom models using the OpenAI API
• Integration with Pydantic for model validation and serialization
• Flexible configuration with retries and temperature settings

Usage

pip install struct-gpt

---

Template variables in the class' docstring are replaced with the keyword arguments passed to from_openai.

from struct_gpt import OpenAiBase
from pydantic import Field


class SentimentSchema(OpenAiBase):
    """
    Determine the sentiment of the given text:

    {content}
    """

    sentiment: str = Field(description="Either -1, 0, or 1.")


print(SentimentSchema.from_openai(content="I love pizza!").json())

outputs:

{
  "sentiment": "1"
}

Your classes can reference one another. You can also use the OpenAiMixin to add functionality to your own classes.

from struct_gpt import OpenAiBase, OpenAiMixin
from pydantic import Field, BaseModel
from typing import Mapping


class SentimentSchema(OpenAiBase):
    """
    Determine the sentiment of the given text:

    {content}
    """

    sentiment: str = Field(description="Either -1, 0, or 1.")


# you can use the OpenAiMixin to add functionality to your own classes
class SentimentAnalysis(BaseModel, OpenAiMixin):
    """
    Determine the sentiment of each word in the following: {text}

    Also determine the overall sentiment of the text and who the narrator is.
    """

    words_to_sentiment: Mapping[str, SentimentSchema]
    overall_sentiment: SentimentSchema
    narrator: str


print(
    SentimentAnalysis.from_openai(
        text="As president, I loved the beautiful scenery, but the long hike was exhausting."
    ).json(indent=2)
)

outputs

{
  "words_to_sentiment": {
    "As": {
      "sentiment": "0"
    },
    "president,": {
      "sentiment": "1"
    },
    "I": {
      "sentiment": "0"
    },
    "loved": {
      "sentiment": "1"
    },
    "the": {
      "sentiment": "0"
    },
    "beautiful": {
      "sentiment": "1"
    },
    "scenery,": {
      "sentiment": "1"
    },
    "but": {
      "sentiment": "-1"
    },
    "long": {
      "sentiment": "-1"
    },
    "hike": {
      "sentiment": "-1"
    },
    "was": {
      "sentiment": "0"
    },
    "exhausting.": {
      "sentiment": "-1"
    }
  },
  "overall_sentiment": {
    "sentiment": "0"
  },
  "narrator": "president"
}

Improving reliability with examples

create can accept a list of examples to guide the model and improve its accuracy. Each example is a dictionary containing an input and output key. The input is the user message and the output is the expected assistant message, which should be a valid instance of the schema serialized as a string.

In this example, we are providing the model with examples of positive and negative sentiments:

from struct_gpt import OpenAiBase
from pydantic import Field


class SentimentSchema(OpenAiBase):
    """
    Determine the sentiment of the given text:

    {content}
    """

    sentiment: str = Field(description="Either -1, 0, or 1.")


examples = [
    {
        "input": "this library is neat!",
        "output": SentimentSchema(sentiment="1").json(),
    },
    {
        "input": "don't touch that",
        "output": SentimentSchema(sentiment="-1").json(),
    },
]

print(SentimentSchema.from_openai(content="I love pizza!", examples=examples).json())

outputs:

{
  "sentiment": "1"
}